The document discusses fundamentals of tooth preparation. It defines tooth preparation as the mechanical alteration of a tooth to receive a restorative material and restore the tooth's health, aesthetics, function and form. The objectives of tooth preparation are to remove all defects, extend restorations conservatively, and position restorations to avoid fracture under force. The document also covers stages, terminology, factors affecting preparation and classifications of tooth preparations.
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Fundamentals of Tooth Preparation
1. 1
FUNDAMENTALS OFFUNDAMENTALS OF
TOOTH PREPARATIONTOOTH PREPARATION
مِ حميِ رَّ نا الِ حنمِْنم رَّ هللا الِ ما اِ سِْنم بِ ا
Dr. Agha Suhail Khan , Associate Professor, Multan Medical & Dental College
2. 2
DEFINATION OF TOOTH PREPARATION
Mechanical alteration of a defective,
injured or diseased tooth to receive a
restorative material that re-establishes a
healthy state for the tooth regarding
esthetic, normal form and function.
Because اremaining اinfected اor ا
friable اtooth اstructure اmay ا
result اin اfurther اcaries ا
progression, اsensitivity, اpain اor ا
fracture اof اtooth اor اrestoration ا
or اboth
Amalgam, اGold
Composite
Restorative اintervention اprimarily
repairs اthe اdamage اcaused اby .ا .ا .ا
3. 3
1. Remove all defects and provide protection to
pulp
2. Extend the restoration as conservatively
3. Form the tooth preparation so that under the
force of mastication the tooth or restoration will
not fracture and restoration will be displaced
4. Esthetic and functional placement of
restoration
OBJECTIVES OF TOOTH PREPARATION
4. 4
INITIAL اSTEPS اOF اPREPARATION:
• Extension to sound tooth structure.
• Depth of preparation .
• Retention of the restorative material.
FINAL اSTEPS اOF اPREPARATION:
• Excavation carious dentine.
• Removing previous restoration.
• Pulp protection.
• Finishing.
• Cleaning.
STAGES OF TOOTH PREPARATION
30. 30
CLASS II
RESTORATION:
• RESTORATION ON
PROXIMAL SURFACES OF
PREMOLARS AND MOLARS:
• DISTO-OCCLUSAL
PREPARATION (DO):
• MESIO-OCCLUSAL
PREPARATION (MO):
• MESIO-OCCLUSO-DISTAL
PREPARATION (MOD):
CLASSIFICATION OF TOOTH
PREPARATION
L
O
G
F
31. 31
CLASS III
RESTORATION:
• RESTORATION ON
PROXIMAL SURFACES
OF ANTERIOR TEETH
WITHOUT THE
INVOLVEMENT OF
INCISAL EDGE:
CLASSIFICATION OF TOOTH
PREPARATION
I
G
FL
32. 32
CLASS IV
RESTORATION:
• RESTORATION ON
PROXIMAL SURFACES
OF ANTERIOR TEETH
THAT INVOLVE THE
INCISAL EDGE:
CLASSIFICATION OF TOOTH
PREPARATION
G
M
L
F
34. 34
CLASS VI
RESTORATION:
• RESTORATION ON
INCISAL EDGE OF
ANTERIOR TEETH
AND OCCLUSAL
CUSP HEIGHT OF
POSTERIOR TEETH:
CLASSIFICATION OF TOOTH
PREPARATION